CModule::IncludeModule('iblock');
$PROPERTY_VALUES = [
"NEW" => "N",
"HIT" => "N"
];
$arFilter = ["IBLOCK_ID" => id_каталога];
$res = CIBlockElement::GetList(false, $arFilter, ['IBLOCK_ID','ID']);
while($el = $res->GetNext())
{
CIBlockElement::SetPropertyValuesEx($el['ID'], id_каталога, $PROPERTY_VALUES);
}